Ascogregarina taiwanensis infection in Aedes aegypti and Aedes albopictus in Santa Catarina, South Brazil

Prophiro, Josiane Somariva; Pereira, Thiago Nunes; Oliveira, Joice Guilherme de; Dandolini, Guilherme Werner; Navarro-Silva, Mário Antônio; Silva, Onilda Santos da

doi:10.1590/0037-8682-0048-2016

Cited by 5 publications

(4 citation statements)

References 12 publications

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“…Aedes albopictus larvae naturally harboring A. taiwanensis (GenBank, NCBC KM387708) were collected from traps (plastic pots and tires) in Tubarão/SC -Brazil in the year of 2014 and brought to the laboratory (Prophiro et al 2017). The emerged adults were kept under controlled conditions as described below.…”

Section: Ascogregarina Taiwanensis Reared In Laboratorymentioning

confidence: 99%

“…To become parasitized, these larvae were separated in two groups: one group with all larval stages together and one group with larvae separated by stage. The con rmation of A. taiwanensis infection in the new generations of mosquitoes was carried out based on morphology of parasites, according to Prophiro (2017). This new generation of Ae.…”

Section: Ascogregarina Taiwanensis Reared In Laboratorymentioning

confidence: 99%

“…albopictus and Ae. aegypti harbouring A. taiwanensis in south Brazil [31], we established this protozoan in laboratory conditions. So, we could evaluate the in uence of this gregarine on some biological aspects of Ae.…”

Section: Introductionmentioning

confidence: 99%

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Ascogregarina Taiwanensis Interfere in the Performance of Aedes Albopictus and in the Susceptibility of Aedes Aegypti to Temephos and Azadirachta Indica Oil

Prophiro

Pereira

Oliveira

et al. 2021

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Background: Aedes albopictus and Aedes aegypti are mosquitoes commonly adapted to tropical and subtropical regions. These vectors can transmit different types of arboviruses causing a serious concern to public health. New alternatives for the vector/arboviruses control are emerging, and in this sense the protozoan Ascogregarina taiwanensis may present potential as a biological control agent against these mosquitoes. Methods: To evaluate the effects of protozoan A. taiwanensis, mosquitoes were parasitized with a solution containing oocysts and evaluated to lifetime, fertility, fecundity for Ae. albopictus and for Ae. aegypti interaction with Azadirachta indica and Temephos. Results: In this work it was possible to observe the protozoan morphology in mosquitoes Ae. albopictus, as well its negative influence on mortality, 73% and non-parasitized was 44%. The number of eggs oviposited by parasitized females of Ae. albopictus was lower (3,490) than for the non-parasitized females (5,586). In addition, the hatchability and/or viability of these eggs were also lower for the parasitized females (63%) than the non-parasitized ones (74%). For Ae. aegypti mosquitoes, a synergism between the use of A. taiwanensis associated with a chemical insecticide and a botanical insecticide was observed. The results demonstrate that when Ae. aegypti larvae was parasitized by A. taiwanensis and exposed to the oil of Az. indica or to the organophosphate Temephos present a greater mortality. Conclusion: It was notable that A. taiwanensis can be a potential for biological control and adjuvant of insecticides. We also provide important information about the maintenance of A. taiwanensis in laboratory.

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Section: Ascogregarina Taiwanensis Reared In Laboratorymentioning

confidence: 99%

Section: Ascogregarina Taiwanensis Reared In Laboratorymentioning

confidence: 99%

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Ascogregarina Taiwanensis Interfere in the Performance of Aedes Albopictus and in the Susceptibility of Aedes Aegypti to Temephos and Azadirachta Indica Oil

Prophiro

Pereira

Oliveira

et al. 2021

Preprint

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“…After ingestion, the gregarine parasite travels through the midgut, epithelial tissues, and excretory system of the mosquito, transitioning into different life stages as the mosquito matures to adulthood. From there, the parasite reproduces and offspring are excreted by the adult mosquitoes into breeding containers [37,38].…”

Section: Introductionmentioning

confidence: 99%

Parasitism of Aedes albopictus by Ascogregarina taiwanensis lowers its competitive ability against Aedes triseriatus.

Stump

Childs

Walker

2020

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Background: Mosquitoes are vectors for diseases that significantly impact the human population such as dengue, malaria and La Crosse virus. When multiple mosquito species are present, the competition between species may alter population dynamics as well as disease spread. Two mosquito species, Aedes albopictus and Aedes triseriatus, both inhabit areas where La Crosse virus is found. Infection of Aedes albopictus by the parasite Ascogregarina taiwanensis and Aedes triseriatus by the parasite Ascogregarina barretti can decrease a mosquito’s fitness, respectively. In particular, the decrease in fitness of Aedes albopictus occurs through the impact of Ascogregarina taiwanensis on female fecundity, larval development rate, and larval mortality and may impact its initial competitive advantage over Aedes triseriatus during invasion.Methods: We examine the effects of parasitism of gregarine parasites on Aedes albopictus and triseriatus population dynamics and competition with a focus on when Aedes albopictus is new to an area. We build a compartmental model including competition between Aedes albopictus and triseriatus while under parasitism of the gregarine parasites. Using parameters based on literature, we simulate the dynamics and analyze the equilibrium population proportion of the two species. We consider the presence of both parasites and potential dilution effects.Results: We show that increased levels of parasitism in Aedes albopictus will decrease the initial competitive advantage of the species over Aedes triseriatus and increase the survivorship of Aedes triseriatus. We find Aedes albopictus is better able to invade when there is more extreme parasitism of Aedes triseriatus. Furthermore, although the transient dynamics differ, dilution of the parasite density through uptake by both species does not alter the equilibrium population sizes of either species.Conclusions: Mosquito population dynamics are affected by many factors, such as abiotic factors (e.g. temperature and humidity) and competition between mosquito species. This is especially true when multiple mosquito species are vying to live in the same area. Knowledge of how population dynamics are affected by gregarine parasites among competing species can inform future mosquito control efforts and help prevent the spread of vector-borne disease.

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Parasitism of Aedes albopictus by Ascogregarina taiwanensis lowers its competitive ability against Aedes triseriatus

2021

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Background Mosquitoes are vectors for diseases such as dengue, malaria and La Crosse virus that significantly impact the human population. When multiple mosquito species are present, the competition between species may alter population dynamics as well as disease spread. Two mosquito species, Aedes albopictus and Aedes triseriatus, both inhabit areas where La Crosse virus is found. Infection of Aedes albopictus by the parasite Ascogregarina taiwanensis and Aedes triseriatus by the parasite Ascogregarina barretti can decrease a mosquito’s fitness, respectively. In particular, the decrease in fitness of Aedes albopictus occurs through the impact of Ascogregarina taiwanensis on female fecundity, larval development rate, and larval mortality and may impact its initial competitive advantage over Aedes triseriatus during invasion. Methods We examine the effects of parasitism of gregarine parasites on Aedes albopictus and triseriatus population dynamics and competition with a focus on when Aedes albopictus is new to an area. We build a compartmental model including competition between Aedes albopictus and triseriatus while under parasitism of the gregarine parasites. Using parameters based on the literature, we simulate the dynamics and analyze the equilibrium population proportion of the two species. We consider the presence of both parasites and potential dilution effects. Results We show that increased levels of parasitism in Aedes albopictus will decrease the initial competitive advantage of the species over Aedes triseriatus and increase the survivorship of Aedes triseriatus. We find Aedes albopictus is better able to invade when there is more extreme parasitism of Aedes triseriatus. Furthermore, although the transient dynamics differ, dilution of the parasite density through uptake by both species does not alter the equilibrium population sizes of either species. Conclusions Mosquito population dynamics are affected by many factors, such as abiotic factors (e.g. temperature and humidity) and competition between mosquito species. This is especially true when multiple mosquito species are vying to live in the same area. Knowledge of how population dynamics are affected by gregarine parasites among competing species can inform future mosquito control efforts and help prevent the spread of vector-borne disease.

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Ascogregarina taiwanensis infection in Aedes aegypti and Aedes albopictus in Santa Catarina, South Brazil

Abstract: Both mosquito species harbored Ascogregarina taiwanensis, whose genomic DNA was confirmed in both the Aedes species by PCR. DNA sequences were deposited in GenBank. Conclusion: Both Ae. albopictus e Ae. aegypti harbor Ascogregarina sp.

Cited by 5 publications

References 12 publications

Ascogregarina Taiwanensis Interfere in the Performance of Aedes Albopictus and in the Susceptibility of Aedes Aegypti to Temephos and Azadirachta Indica Oil

Ascogregarina Taiwanensis Interfere in the Performance of Aedes Albopictus and in the Susceptibility of Aedes Aegypti to Temephos and Azadirachta Indica Oil

Parasitism of Aedes albopictus by Ascogregarina taiwanensis lowers its competitive ability against Aedes triseriatus.

Parasitism of Aedes albopictus by Ascogregarina taiwanensis lowers its competitive ability against Aedes triseriatus

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